Version 1
: Received: 9 October 2024 / Approved: 9 October 2024 / Online: 9 October 2024 (11:05:23 CEST)
How to cite:
Musigwa, S.; Cozannet, P.; Asiamah, C. A.; Wu, A. S.-B. Optimum Level of Essential Amino Acids-to-True Protein and Energy in Reduced Protein Diets Has the Potential to Enhance Broiler Performance. Preprints2024, 2024100650. https://doi.org/10.20944/preprints202410.0650.v1
Musigwa, S.; Cozannet, P.; Asiamah, C. A.; Wu, A. S.-B. Optimum Level of Essential Amino Acids-to-True Protein and Energy in Reduced Protein Diets Has the Potential to Enhance Broiler Performance. Preprints 2024, 2024100650. https://doi.org/10.20944/preprints202410.0650.v1
Musigwa, S.; Cozannet, P.; Asiamah, C. A.; Wu, A. S.-B. Optimum Level of Essential Amino Acids-to-True Protein and Energy in Reduced Protein Diets Has the Potential to Enhance Broiler Performance. Preprints2024, 2024100650. https://doi.org/10.20944/preprints202410.0650.v1
APA Style
Musigwa, S., Cozannet, P., Asiamah, C. A., & Wu, A. S. B. (2024). Optimum Level of Essential Amino Acids-to-True Protein and Energy in Reduced Protein Diets Has the Potential to Enhance Broiler Performance. Preprints. https://doi.org/10.20944/preprints202410.0650.v1
Chicago/Turabian Style
Musigwa, S., Collins A. Asiamah and and Shu-Biao Wu. 2024 "Optimum Level of Essential Amino Acids-to-True Protein and Energy in Reduced Protein Diets Has the Potential to Enhance Broiler Performance" Preprints. https://doi.org/10.20944/preprints202410.0650.v1
Abstract
Supplementing essential amino acids (EAA), without considering non-EAA (NEAA) and energy contents in reduced crude protein (CP) diets may alter essential-to-total AA or true protein (E:T) and energy-to-protein ratios, potentially compromising growth. This study aimed to evaluate the effects of CP, E:T and net energy (NE) on broiler performance. Treatments were: T1— reduced CP (16%, RP), low NE (9.9 MJ/kg, LNE), low E:T (0.56, LE:T); T2—RP, LNE, high E:T (0.60, HE:T), with imbalanced EAA (excess Met and deficient Thr); T3—RP, high NE (10.4 MJ/kg, HNE), LE:T; T4—RP, HNE, HE:T; T5— normal CP (18%, NP), LNE, LE:T; T6—NP, LNE, HE:T; T7—NP, HNE, LE:T; and T8—NP, HNE, HE:T. The study employed as-hatched Cobb 500 broilers in two experiments. Exp.1 studied performance from d19 to 35, with 8 replicates per treatment and 16 birds per replicate (n=1024). Exp.2 measured NE values in respiration chambers from d25 to 28, with 6 replicates per treatment, and 2 birds (a male and a female) per replicate (n=96). The measured NE values were used to calculate NE intake (NEi) in Exp.1. The results showed that T4 improved (P < 0.001) weight gain (WG), feed conversion ratio (FCR), and NEi relative to T1, T2 and T3, and protein efficiency (WG/CP intake) relative to all treatments. The live performance (feed intake, WG, FCR) and NEi of birds fed T4 reached a level equal to those of birds fed NP-diets (T5 to T8). These results suggest that a dietary E:T ratio of 0.60 is necessary to maximize nutrient utilization and to restore growth rate in broilers fed RP-diets.
Keywords
essential-to-total amino acid ratio; crude protein; net energy; reduced protein diet; true protein
Subject
Biology and Life Sciences, Animal Science, Veterinary Science and Zoology
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
